龟甲 Traditional form: 龜甲 Pinyin (reading): guījiǎ Definitions: tortoise shell Characters: 龟 - turtle, tortoise; cuckold 甲 - armor, shell; fingernails; 1st heavenly stem Traditional characters: 龜 - turtle, tortoise; cuckold 甲 - armor, shell; fingernails; 1st heavenly stem